// Thud - a dynamic object-oriented language
// Copyright (C) 2009,2010 David H. Hovemeyer <david.hovemeyer@gmail.com>

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

/*
 * FileOutputStream.cpp
 *
 *  Created on: Dec 15, 2009
 *      Author: dhovemey
 */

#include <cstring>
#include <cerrno>
#include "util/String.h"
#include "util/IOException.h"
#include "util/EOFException.h"
#include "util/FileOutputStream.h"

FileOutputStream::FileOutputStream(const std::string &fileName)
	: m_out(fopen(fileName.c_str(), "wb"))
{
	if (!m_out) {
		std::wstring msg(L"Could not open ");
		msg += String::fromUtf8(fileName);
		msg += L": ";
		msg += String::fromUtf8(strerror(errno));
		throw IOException(msg);
	}
}

FileOutputStream::~FileOutputStream()
{
	if (m_out) {
		fclose(m_out);
	}
}

void FileOutputStream::write(int c)
{
	char buf[1];
	buf[0] = c;
	write((const void *) buf, 1);
}

void FileOutputStream::write(const void *buf, size_t n)
{
	size_t numWritten = 0;

	while (numWritten < n) {
		size_t rc = fwrite(buf, 1, n, m_out);
		if (rc == 0) {
			if (feof(m_out)) {
				throw EOFException(numWritten);
			}
			if (ferror(m_out)) {
				throw IOException(String::fromUtf8(strerror(errno)));
			}
		}
		numWritten += n;
	}
}
